Differential Geometry/notation help

It maps the tangent vector w1 at p to the tangent vector dfp(w1) at f(p). This means that for a local isometry, the inner product of two tangent vectors w1 and w2 at point p in S is equal to the inner product of their corresponding tangent vectors dfp(w1) and dfp(w2) at point f(p) in S'.In summary, the conversation is discussing a theorem that defines local isometry between two surfaces using a smooth map. The confusion is in understanding the notation dfp(w1) and its relationship to the tangent space at points p and f(p) in the two surfaces. The clarification is that dfp is a derived mapping that maps a tangent vector at p to
  • #1
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Homework Statement



I have this theorem which I am having trouble understanding due to notation.

Theorem: Define S,S'[itex]\subseteq[/itex]ℝ3 to be surfaces. Let f:S→S' be a smooth map. f is a local isometry if for all p in S, and all w1,w2 in TpS,
<w1,w2>=<dfp(w1),dfp(w2)>.


The thing I don't get, is what does dfp(w1) mean?
What action is going on between dfp and w1?


Thank you for your time.
 
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  • #2
[itex]df_p[/itex] is the derived mapping from the tangent space at p in S to the tangent space at f(p) in S'.
 

Related to Differential Geometry/notation help

1. What is differential geometry?

Differential geometry is a branch of mathematics that studies the properties of curves and surfaces using the techniques of calculus and linear algebra. It is used to understand the geometric properties of objects in higher dimensions.

2. What is the difference between differential geometry and regular geometry?

Regular geometry, also known as Euclidean geometry, focuses on the properties of shapes in a flat, two-dimensional space. Differential geometry, on the other hand, studies the properties of curves and surfaces in higher dimensions, including curved spaces.

3. What is the notation used in differential geometry?

The notation used in differential geometry is a combination of symbols and expressions from calculus and linear algebra. Common symbols include Greek letters, such as α and β, and mathematical operators, such as ∂ and ∇. It is important to carefully define and understand these symbols when working with differential geometry.

4. How is differential geometry used in real-world applications?

Differential geometry has a wide range of applications in various fields, including physics, engineering, and computer graphics. It is used to model and understand the behavior of objects in curved spaces, such as the motion of planets in space or the shape of a car's body.

5. What are some common challenges in understanding differential geometry?

Some common challenges in understanding differential geometry include the use of complex mathematical notation, the abstract nature of the subject, and the need to have a strong foundation in calculus and linear algebra. It is important to practice and review these concepts regularly to fully grasp the principles of differential geometry.

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